No specific authority is required from the FCC for reduced power operation of up to 30 days, but the FCC must be notified if it is 10 days or more. An STA is required for more than 30 days of reduced power operation. http://louise.hallikainen.org/FCC/FccRules/2009/73/1560/ Harold -- FCC Rules Updated Daily at http://www.hallikainen.com